const char*  vertexShaderCode =
        "#version 430\r\n"
        ""
        "in layout(location=0) vec3 position;"
        "in layout(location=1) vec3 vertexColor;"
        ""
        "out vec3 theColor;"
        ""
        "void main()"
        "{"
        "   gl_Position = vec4(position, 1.0);"
        "   theColor = vertexColor;"
        "}";

const char* fragmentShaderCode =
        "#version 430\r\n"
        ""
        "out vec4 daColor;"
        "in vec3 theColor;"
        ""
        "void main()"
        "{"
        "   daColor = vec4(theColor,1.0);"
        "}";
